Bootcamp Missing Operating System

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solved; see last post I'm trying to create an image backup solution for a Dell Optiplex 380; it's a 32-bit system. Reflect is installed and running fine; created a good image to an external drive. Now, I'm trying to create the boot media to a 16gb flash drive. It apparently completed ok. But, when I reboot the computer, right after POST (Dell logo screen) it just goes to black screen with a 'Missing Operating System' message. The rescue environment is set in the wizard to: Win PE 3.1 32-bit architechture Default base WIM I have: 1.

Unfortunately it appears that I have a 'Missing Operating System' on that partition now? The Mac-side still recognizes the partition, and I can still boot from it, but.

Created the bootable flash twice, the first time with the USB stick right out of the package new; the second by formatting FAT32 2. Created the bootable flash again on a different, 32gb USB stick right out of the package. Verified in BIOS that USB device is first, SATA HDD is second (to make sure it's not trying to boot of of another media) 4. Shut down, removed all other USB devices from the machine, pressed the power button. Aside from the missing keyboard error, I still get the 'Missing OS' message.

Installed the demo version of macrium reflect on another, 64-bit machine and created the boot USB with the same 16gb flash media; it works fine. Returned to the 32-bit machine; relaunched Reflect from windows; rebuilt the rescue environment and created the media on the 16gb flash drive Any other ideas? You could try adding the rescue media build to your regular system boot menu to confirm that the WinPE build itself boots the machine properly.

See for details. If the rescue build works okay when booting on your main OS drive, the problem has to be either the USB stick itself or some setting in your system's UEFI/BIOS configuration. Is it configured for MBR booting or UEFI booting and is the so-called 'secure boot' feature enabled? Is the USB stick FAT32 partition marked Active? Does that Dell OptiPlex model provide a special F-key selector to choose the boot drive during start-up?Regards, Richard V. You could try adding the rescue media build to your regular system boot menu to confirm that the WinPE build itself boots the machine properly.

See for details. If the rescue build works okay when booting on your main OS drive, the problem has to be either the USB stick itself or some setting in your system's UEFI/BIOS configuration. Is it configured for MBR booting or UEFI booting and is the so-called 'secure boot' feature enabled? Does that Dell OptiPlex model provide a special F-key selector to choose the boot drive during start-up? Thanks for the suggestions.

The WinPE build boots fine from the boot menu; So we've eliminated that. For drill I checked for bios updates; upgraded from A05 to A07; That didn't help. This machine doesn't support UEFI (too old); so the option in the Reflect wizard didn't even offer the option as the other/64-bit machine did. So, I'm guessing that means it's set to MBR by default. I checked all of the security sections in the bios and nothing was activated. During boot you can hit F2, which takes you to the bios settings; or F12 for a special 'one time boot screen'; options here are to boot from SATA drive, USB (this option shows when USB is enabled in bios), USB or internal optical drive, or network.

Choosing USB here just gives me the 'missing os' message. Choosing SATA gives me the menu with the option to boot to the macrium rescue media set up per the KB article you linked. I have gotten this specific stick to boot the other machine, so the stick is good. And, once booted, the USB port used on the problem machine mounts the volume fine. So, the USB port is functional. Still scratching my head on this one.

Solution: For the benefit of anyone else with this issue, for some reason Reflect was not setting the USB stick's recovery environment to the active partition. In a command prompt run: Diskpart at the Diskpart prompt run: List Disk Note the ID of the flash drive. Mine was noted as ID1 w/ 14gb of space still at the Diskpart prompt run:Select Disk n (where n is your usb drive.in my case 1)Select partition 1 (just selecting the first partition, nothing to do with the value of the drive ID as in the command above)ActiveExit The flash drive now boots the machine to the Reflect recovery software. Solution: For the benefit of anyone else with this issue, for some reason Reflect was not setting the USB stick's recovery environment to the active partition.

In a command prompt run: Diskpart at the Diskpart prompt run: List Disk Note the ID of the flash drive. Mine was noted as ID1 w/ 14gb of space still at the Diskpart prompt run:Select Disk n (where n is your usb drive.in my case 1)Select partition 1 (just selecting the first partition, nothing to do with the value of the drive ID as in the command above)ActiveExit The flash drive now boots the machine to the Reflect recovery software. Setting the partition to active (as above) worked for me. Clear instructions. Could be useful to include in the instruction manual and or with the rescue setup as a selectable option.

Solution: For the benefit of anyone else with this issue, for some reason Reflect was not setting the USB stick's recovery environment to the active partition. In a command prompt run: Diskpart at the Diskpart prompt run: List Disk Note the ID of the flash drive. Mine was noted as ID1 w/ 14gb of space still at the Diskpart prompt run:Select Disk n (where n is your usb drive.in my case 1)Select partition 1 (just selecting the first partition, nothing to do with the value of the drive ID as in the command above)ActiveExit The flash drive now boots the machine to the Reflect recovery software. Setting the partition to active (as above) worked for me.

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Clear instructions. Could be useful to include in the instruction manual and or with the rescue setup as a selectable option. Seems pretty clear in step 8 of the instruction manual on this page.

When the operating system is missing or operating system not found error occurs on your PC, it would be impossible for you to boot up PC or start a Windows system. You'll be presented with a black screen with an error message 'Missing operating system.' Or 'Operating System not found.'

Facing this problem, you'll not get any access to Windows 10/8/7 then. So how to fix such a problem? Is it possible to find access or solutions to fix the issue and get the system restored? Let's find out causes and solutions to correct missing operating system error in Windows 10/8/7 now.Workable SolutionsStep-by-step TroubleshootingFix 1. Check BIOSPress and hold 'F12/F10' to enter BIOS.Fix 2. Reboot from a bootalbe diskPress and hold 'F10' and press 'Power'.Fix 3.

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Set BIOS to default settingsFind BIOS and enable the default setup option.Fix 4. Rebuild MBRChoose one of the two options to repair.Fix 5.

Set correct partition activeBoot computer with WinPE bootable disk.Knowing reasons and causes for how did your computer fail to find the operating system or what makes the operating system not found will make it much easier for you to find the exact solutions to fix this problem and get your Windows system back again. Part 1: Reasons/causes for the operating system not found error. System/BIOS does not detect Windows installation hard drive/disk. System hard disk drive failure due to physical/logical damage. Improper/incorrect set BIOS settings. Windows Master Boot Record disk is corrupt/damaged.

Windows boot files in system partition are no longer activeAfter knowing the top 5 major reasons that cause operating system missing in Windows, you may try to figure out which reason that has caused your Windows OS not found and then find a relative solution to fix the problem. Part 2: Solutions to fix missing operating system error in Windows 10/8/7Here you'll find workable solutions to these five problems that cause your computer fails to boot with the operating system not found error. Solution 1: Check if the hard drive is detected by BIOSStep 1: Press and hold 'F12/F10' while pressing the 'Power' button to turn on the PC.Step 2: Release F12/F10 when the BIOS Setup Utility is displayed.Step 3: Try to find IDE Primary Master, IDE Primary Slave, IDE Secondary Master and check whether they can be detected or not.If no disk is shown or displayed as None/Not Detected, it means that the BIOS doesn't detect the drive and you may select None to Auto. This may solve OS not found error.If the system disk information is displayed, it means that BIOS can detect the hard drive and you need exit BIOS. Solution 2: Test hard disk drive and reboot computer from a WinPE bootable diskStep 1: Press and hold 'F10' and press the 'Power' button to turn on PC Release F10 after the PC screen display you with testStep 2: Use Right Arrow to select the 'Tools' menu in BIOS Setup UtilityStep 3: Then select 'Hard Drive Self Test' Press 'Enter' to start the testIf all tests pass, the hard drive is not damaged. You may jump to Solution 3 to reset BIOS to default state.If any tests failed, please contact your hard disk or computer manufacturer for a replacement as long as these devices are under warranty.If you don't want to let the operating system not found issue bother you, you may directly reboot the computer from a WinPE bootable disk.

Professional - EaseUS Partition Master will help you easily to reboot your computer without any obstacles. You can download it and follow steps to reboot the computer from a WinPE bootable disk now. You have created an EaseUS Partition Master WinPE bootable disk now. EaseUS also provides 1-on-1 remote assistance to fix the boot issue.

If the solution above does not work for you, please contact our professionals via Email or LiveChat in. To ensure our professional assistance work, you are suggested to connect the unbootable system drive to a healthy computer when getting connected with us.

Solution 3: Set BIOS to default settingsImproper settings or incorrect BIOS setting may also cause the issue 'operating system not found' in your PC. You can try to set BIOS to default settings to solve the problem.Step 1: Restart PC and enter BIOS.Step 2: Find BIOS and enable the default setup option, including Load Optimal Defaults, Get Default Values, Load Optimized Defaults, Load Setup Defaults, and so on.Step 3: Press 'F10' to save changes and quit from BIOS.If this method doesn't work, the MBR disk could be damaged and you may jump to Solution 4 to find the MBR disk repair method. Solution 4: Repair/Rebuild MBR (Master Boot Record) diskHere we have two methods to help you repair or rebuild MBR disk: repair MBR with Windows installation disk or repair MBR disk with partition manager software.

Windows 10 is supported Solution 5: Set correct partition activeWhen Windows is running under Legacy BIOS + MBR mode, the boot partition/system partition should be set as active so that MBR can pass boot right to boot manager and find Windows. If the system partition or boot partition is not set to active, you may encounter the operating system not found issue. How to set the correct partition active? You may follow below steps to set boot partition active:Step 1: Boot computer with WinPE bootable disk created by EaseUS Partition Master.Step 2: In EaseUS Partition Master window, right-click the boot partition and select 'Set active'.Step 3: Follow onscreen guidance to reboot the computer with Windows system then.All effective solutions for Missing Operating System or Operating System not Found error are all presented to you now. You may try any one methods to fix your problem and get a healthy Windows system back and continue use your computer again. Why Choose EaseUS Partition Master?'

I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions.' —'Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available.' —'I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes.' — Will the 'Migrate OS' feature transfer the Windows system files only or the whole C drive?To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions.

Generally, the boot partition is the C drive so the transfer will include all the files in C. Does EaseUS Partition Master license apply to multiple computers?The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines. What is the difference between EaseUS Partition Master Trial version and the Free version?Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine. Will it cause any data loss after resizing the partition in EaseUS Partition Master?Generally, it will not cause any data loss or boot issue by resizing a partition.

However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.